1 ; RUN: llc -O2 -mtriple arm < %s | FileCheck %s
3 ; Function Attrs: norecurse nounwind readnone
4 define i32 @foo(i32 %vreg0, i32 %vreg1, i32 %vreg2, i32 %vreg3, i32 %vreg4) local_unnamed_addr {
6 %conv = zext i32 %vreg2 to i64
7 %conv1 = zext i32 %vreg0 to i64
8 %add2 = add nuw nsw i64 %conv, %conv1
9 %shr = lshr i64 %add2, 32
10 %conv4 = trunc i64 %shr to i32
11 %conv5 = and i64 %add2, 4294967295
12 %add8 = add nuw nsw i64 %conv5, %conv1
13 %shr9 = lshr i64 %add8, 32
14 %conv10 = trunc i64 %shr9 to i32
15 %add11 = add nuw nsw i32 %conv10, %conv4
16 %conv12 = zext i32 %vreg3 to i64
17 %conv14 = zext i32 %vreg1 to i64
18 %add15 = add nuw nsw i64 %conv12, %conv14
19 %shr16 = lshr i64 %add15, 32
20 %conv19 = zext i32 %vreg4 to i64
21 %add20 = add nuw nsw i64 %shr16, %conv19
22 %shr22 = lshr i64 %add20, 32
23 %conv23 = trunc i64 %shr22 to i32
24 %add24 = add nuw nsw i32 %add11, %conv23
27 ; CHECK: push {r11, lr}
28 ; CHECK-NEXT: adds r2, r2, r0
29 ; CHECK-NEXT: mov r12, #0
30 ; CHECK-NEXT: adc lr, r12, #0
31 ; CHECK-NEXT: adds r0, r2, r0
32 ; CHECK-NEXT: ldr r2, [sp, #8]
33 ; CHECK-NEXT: adc r0, r12, #0
34 ; CHECK-NEXT: adds r1, r3, r1
35 ; The interesting bit is the next instruction which looks
36 ; like is computing a dead r1 but is actually computing a carry
38 ; CHECK-NEXT: adcs r1, r2, #0
39 ; CHECK-NEXT: adc r0, r0, lr
40 ; CHECK-NEXT: pop {r11, lr}
41 ; CHECK-NEXT: mov pc, lr